/*
 * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.otter.manager.biz.config.typehanler;

import com.alibaba.otter.shared.common.utils.JsonUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * 用于ChannelParameter的解析
 *
 * @author simon
 */
public abstract class JsonTypeHandler<T> extends BaseTypeHandler<T> {

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, T parameter, JdbcType jdbcType) throws SQLException {
        ps.setString(i, JsonUtils.marshalToString(parameter));
    }

    @Override
    public T getNullableResult(ResultSet rs, String columnName) throws SQLException {
        String result = rs.getString(columnName);
        return StringUtils.isBlank(result) ? null : JsonUtils.unmarshalFromString(result, getRawType());
    }

    @Override
    public T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        String result = rs.getString(columnIndex);
        return StringUtils.isBlank(result) ? null : JsonUtils.unmarshalFromString(result, getRawType());
    }

    @Override
    public T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        String result = cs.getString(columnIndex);
        return StringUtils.isBlank(result) ? null : JsonUtils.unmarshalFromString(result, getRawType());
    }
}
